P    #regions in PPM
# 2011-06-16 11:44:08 -0500  mfjofre@kerry
# low field   high field   mi   maxi
  3.806178450793779  3.687235374206473  0.299  0.979  # for region 1
  3.1890209779351175  3.090275782277732  0.294  0.847  # for region 2
  2.8950295999551736  2.7738423143756545  0.304  0.675  # for region 3
  2.7132486715858954  2.6212361029051494  0.178  0.655  # for region 4